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Patented Jan. 16, 11923.,

I ATENT @DFFHGEO ZACHARIAS OLSSON, OF NEW YORK, N. Y., ASSIGNOR OF SIX-TENTHS T AUGUST RUST- OPPENHEIM, 01E NEW YORK, N. Y.

REFRACTORY MATERIAL.

No Drawing. Application filed September 15, 1920. Serial No. 410,379.

To all whom it may concern: of bentonite and thoroughly mix the same. Be it known that I, ZACHARIAS OLssoN, a When it is desired to use this mixture, sufii- ,subject of the King of Sweden, residing in cient water is added tom'ake it plastic. 1 the city, county, and State of New York, have found that about 50% water by 25 5 have'invented a new Refractor 'Material, of weight is satisfactory. By the use of benwhich the following is a speci cation. tonite as a binder I have been able to re- My invention relates to the manufacture duce the amount of binder used from 40% of a refractory material suitable for 'cru to 5%, the result being that there is a great cibles, lining of furnaces and thelike. deal less shrinkage and the crucible or 30 Heretofore it has been the custom to utilize the lining (when the refractory material bauxite in the manufacture of refractory is used for lining) gives much better rematerial. The great drawback has been sults for the reason that there is more rethat it required a large amount of clay fractory material in the composition and (from to per cent) as a binder in less binder. 3e 15 order to make the bauxite plastic enough I claim:

- to be worked, I have found that by the use 1 A refractory material comprising not of a peculiar clay I am able to reduce the less than of bauxite and not more than amount of binder used very materially. 5% of bentonite'. V I calcine bauxite, ground to l00 mesh, at In testimony whereof I have aflixed my 40 20 a temperature of about 800 C. I take 95 signature to this specification.

parts of this calcined bauxite and 5 parts ZACHARIAS OLSSON. 

